"We suspect that ALMA will allow us to observe this rare form of CO in many other discs. By doing that, we can more accurately measure their mass, and determine whether scientists have systematically been underestimating how much matter they contain."

Oz,
I think Chip is asking if there is passive pull-up resistors on or added to the BeMicro board.

"We suspect that ALMA will allow us to observe this rare form of CO in many other discs. By doing that, we can more accurately measure their mass, and determine whether scientists have systematically been underestimating how much matter they contain."

Yes, I was unclear what ozpropdev changed in the test tho. One way to read it was an older PNut works with newest FPGA image ?
Or, does it mean a PNut what works with v23 image, now fails on v24 image ?

... I've been bothered by PNut's comms stability since I got my Prop123 board. Ie: I can't use PNut for my Prop123-A9 board. The data flow is precise and complete but the handshaking is wacky.
In particular, the Prop gets a physical reset pulse just when the main binary transmit starts.
From memory, it's the third of three resets that occur during the whole process after pressing F11.

Too many resets, and especially a very late one could cause problems. Just one clean reset should be all that's needed ?
Do the FPGAs have identical OSC and PLL settings ?
I could imagine a different PLL choice locks in a different time, and if the PLL is not stable when RX starts, that could throw things.

The ONLY thing that changed was that hub timing was sped up to match the number of cogs, instead of a static 1:16, as before.

It's also only one variant of FPGA, so it's likely something is slightly different on that board, so becomes marginal for PNut only.
Faster HUB timing would move things, but not by much in comms-terms one would think.
Can you clean up the 3? reset pulses from PNut to have one reset, with a reasonable set-up time ?

Chip
I just noticed something.
The beMicro-A9 board used to identify its version as "Prop_Ver Au" the same as the P123-A9 board.
Now it shows as "Prop_Ver Fu".
Not sure when that changed or if that's relevant?

I also have my own loader which loads code Ok to the V24 in the board.
Scratching head.....

JMG,
It's an unintentional three RTS pulses (we thought it was DTR at the time) that shows up when in Wine specifically, Peter reported it didn't occur in his tests on VM'd WinXP. I'm presuming, like me, he doesn't have any dedicated Windoze setup. I have an old Win98 laptop but PNut doesn't work on that at all.

It appears as only two resets to the Prop, since the first two pulses are close enough that the first reset hasn't finished so is just extended instead.

The question on my mind right now is maybe Oz is getting some variation of the late (third) RTS occurring.

"We suspect that ALMA will allow us to observe this rare form of CO in many other discs. By doing that, we can more accurately measure their mass, and determine whether scientists have systematically been underestimating how much matter they contain."

...
I managed to get the BeMicroA9 board working with Pnut by simply moving the PropPlug away from the board.

How much 'move away' is needed ?
Reminds me of the thread around FLiP with GPS modules, but there the RF cross talk effect has a more direct understanding.
Here, the ground inductance and coupling will change, but surely by very small amounts.
Do you have other USB-UART Bridges you can try ?

Heh, wonder what happens if an earthed scope probe is clipped to the board ground. If the problem goes away then it'll be tricky to troubleshoot.

"We suspect that ALMA will allow us to observe this rare form of CO in many other discs. By doing that, we can more accurately measure their mass, and determine whether scientists have systematically been underestimating how much matter they contain."